Collapsible core



P. DE 'MAmA. COLLAPSIBLE CORE.

APPLICATION FILED JUNE 8,1920- 13893439. Patente Aug. 30, 1921..

' 1 2 SHEETSSHEET l.

A TTORNEYS P. DE MATT IA.

COLLAPSIBLE CORE.

APPLICATION FILED JUNE 8,1920.

Patented Aug. 30, 1921.

2 SHEETS-SHEET 2.

- 0 III ATTORNEYS UNITED STATES PATENT OFFICE.

PETER DEMATTIA, OF CLIFTON, NEW JERSEY.

the same to distorting stress or pressure.

COLLAZPSIBLE coma.

Patented Aug. 30, 1921-.

Application filed June 8, 1920. Serial No. 387,414.

To all whom it may concern:

Be it known that I, PETER DE MATTIA, a citizen of the United States of America, and a resident of Clifton, county of Passaic, and State of New Jersey, have invented a new and useful Improvement in Collapsible Cores used in the Manufacture of Shoes or Casings for Pneumatic Tires.

The object of the present invention is to produce a collapsible core comprising a plurality of articulated sections so constructedand connected together as to afford a maximum of movement to the pivoted parts and thus greatly facilitate the removal of the uilt-up shoe or casing without subjecting A further object of the invention is to provide a sim 1e means to facilitate the withdrawal of t e movable sections from the shoe or casing, and to provide means whereby the key section may be entirely removed from a position of operative continuity and supported within convenient reach of the operator, thus affording a largely increased movement of the pivoted sections.

To the above ends the present invention consists of the'collapsible core and the devices and combinations of devices which will be hereinafter described and claimed.

The invention is illustrated in the accompanying drawings in which- Figure 1 shows a top plan view of the collapsible core with the parts in operative continuity. I i Fig. 2 shows a diametrical sectional view taken on the line 2-2 in Fig. 1.

Fig. 3 shows a view similar to Fig. with the key section in the process of retraction.

Fi 4- is a fragmentary detail, parts being s own in section, and parts in elevation, illustrating the manner of supporting the key section when removed from -1tS connection with the chuck.

Fig. 5 is a fragmentary detail, parts be Fi 6 is a fragmentary detail, parts be-- ings own in elevation, and parts in section,

illustrating the manner of connecting the retracting device with the chuck,

' The core comprises a plurality of ,segmental sections, there being tions shown in the device as illustrated.

The segmental section 1 is a fixed section and is connected by means of: bolts 2-to the radial arms 3 and 5. A swinging section 6 is pivotally connected as at 7 to the arm etand'it is preferably provided with a brace 8 resting upon a projection or rest 9 carried'by the arm 4, as shown indotted lines in Fig. 1, the brace 8 and the rest 9 helping to support the swinging section 6 in its pivotal movements.

A relatively short segmental section 10 is pivotally mounted at 11 to a swivel 12 mounted to turn in a lug 13 formed upon the inner surface of the fixed section 1, the arrangement being such that the section 10 can swing inwardly about the pivot 11 and also downwardly by reason of the pivotal action of the swivel 12 in its supporting In I 13.

The space between the free ends 0 the sec- I four such .sec-

4 projecting from a chuck he chuck 5 is also provided with a swing- I ingbrace-bar 19 pivotally mounted upon a headed stud 20 and provided at its free end with a hook or notch 21 arran ed to engage beneath the head of the headed stud 22, the arrangement bein 19 may be moved rom the position shown in Fig. 1, spanning the guideway 16 and the bar 15 to the positionshown in Fig. 3. I

Pre erably this bar 19 is provided with a threaded bearing 23 receiving a threaded screw 24, provided with arms 25 whereby the same may be turned to cause its lower end to engage-the bar 15 and to hold it in its out ward position with the segmental section 14.v

are positioned so that they may be engaged such that the brace-bar mounted in the free end 0 by the lower end of the screw 23 to hold the key section, or be engaged by a retracting device which will now be described.

The retracting device is shown in Figs. 3, 5 and 6 and comprises a lever 27 which at one end is provided with a handle 28 and at its opposite end with a downwardly projecting stud 29.

The stud 29 is adapted to be removably engaged with any one of the sockets 30, 31 and 32 carried by the ears 33 formed integrally with the chuck,

The lever 27 carries a short link 34 pivotally connected thereto at 35 and which at its outer end carries a down turned stud 36 which may be engaged with the sockets 26 of the arm 15, or with the sockets 37 formed in the car 38 carried by the pivoted section 6, or with the socket 39 formed in the car 40 of the section 10.

The chuck 5 may be mounted upon any suitable support, but referably upon a rotary table 41 carried y a ivotal stud 42 the jack am 43 whereby the table 41 may freely turn about the pivot 42.

The table will be preferably provided with notches 44 arranged to be engaged by a latch 45 carried by the jack arm 43.

The brace 17 is provided with an extended rojection 46 in which is formed an opening 47 whereby when the arm 15 shall have been moved backwardly it may be passed downwardly into the opening 4 to support the segmental section 14 in a convenient position for the operator and out of the path .of movement of the swinging parts.

In order to prevent the segmental section 14 from passing downward too far when supported by the bracebar 17, it is provided with a stop 48 having a hooked end 49 arranged to engage over the bar -at the outer end of the openin 47 as shown clearly in Fig. 4 of the drawings.

11 operation, assuming. the parts to be in operative continuity as shown in Fig. 1, the operator first retracts the segmental section 14, using for this purpose the retracting device which is positioned as shown in Fig. 3 with its stud 29 in engagement with the socket 30 in the ear 33 and with the stud 36 of the link 34 inserted in one of the sockets 26 of the arm 15. By engaging the stud 36 in the sockets progressively the lever 27 may be swung in the direction of the arrow as shown in Fig. 3 to draw back the segmental section 14 as indicated in Fig. 3.

After the segmental section 14 has been retracted it is lifted out of the plane of the core and shank 15, and allowed to slide downward so that stop 48 will rest on projection 46 of the brace 17. The pivotal section 10 is then withdrawn from the casing or shoe and for this purpose the retracting device is engaged with the socket 39 in the 66 .on pivot pin 7 out of the casing.

When the core sections are in the position above described the tire casing can be removed by forcing it upward and out of the plane of section 10.

The meeting faces of the free ends of the sections 6 and 10 and of the key section 14 will preferably be provided with complementary engaging devices such as the projections 50 and notches 51 at the outer circumference, and projections 52 and notches 53 at the inner circumference.

Also the meeting faces of the section 6 and section 1 will preferably be provided with the interlocking tenon and groove 54 shown in dotted lines in Fig. 1, and the meeting ends of the sections 10 and 1 with the interlocking projection and groove 55 shown in dotted lines in Fig. 1.

Having described my invention, I claim:

1. A collapsible core comprising a plurality of segmental sections, one of said sections being a key section, a shank carried by said key section, a chuck supporting said sections, a guideway in said chuck to receive the shank of the key section, and a brace bar spanning the guideway at its rear end.

2. A collapsible core comprising 'a movable segmental section, a chuck supporting the said section, a retracting device and complementary engaging means carried by the segmental section, chuck, and the retracting device, whereby the retracting device may be removably connected to the chuck and the movable segmental section for retracting.

for locking the shank in its engagement with the chuck.

4. A collapsible core comprising a plu 'rality'of segmental sections, one of said sections comprising a key. section, a sliding shank carried by the key section and engaging a guideway in the chuck, and a su port for said shank and key section at the rear end of such guideway when removed plane of operative continiiity of the core, from the chuck. a sliding removable connection between the 5. A collapsible core comprising a plukey section and the chuck, and a brace bar 10 rality of segmental sections, one of said secat the rear end of the sliding connection po- 5 tions being a key section and two of said sitioned to receive the shank and support sections being pivoted to swing inward and the key section when removed. outward and also to be positioned below the PETER DE MATTIA. 

